The number of blue and green stickers are equal.
If Adam gives away 30 blue stickers and 10 green stickers,
the ratio of blue stickers to green stickers becomes 1 : 3.
How many stickers are there at first?
|
Blue |
Green |
Before |
1 u + 30 |
3 u + 10 |
Change |
- 30 |
- 10 |
After |
1 u |
3 u |
The number of blue and green stickers is the same at first.
1 u + 30 = 3 u + 10
3 u - 1 u = 30 - 10
2 u = 20
1 u = 20 ÷ 2 = 10
Number of stickers that Adam has at first
= 1 u + 30 + 3 u + 10
= 1 u + 3 u + 30 + 10
= 4 u + 40
= 4 x 10 + 40
= 40 + 40
= 80
Answer(s): 80